MY134001A - Direct digital synthesis in a qam demodulator - Google Patents

Direct digital synthesis in a qam demodulator

Info

Publication number
MY134001A
MY134001A MYPI20010767A MYPI20010767A MY134001A MY 134001 A MY134001 A MY 134001A MY PI20010767 A MYPI20010767 A MY PI20010767A MY PI20010767 A MYPI20010767 A MY PI20010767A MY 134001 A MY134001 A MY 134001A
Authority
MY
Malaysia
Prior art keywords
direct digital
receive filter
dds
circuit
digital synthesis
Prior art date
Application number
MYPI20010767A
Inventor
Maalej Khaled
Hamman Emmanuel
Demol Amaury
Levy Yannick
Original Assignee
Atmel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atmel Corp filed Critical Atmel Corp
Publication of MY134001A publication Critical patent/MY134001A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3872—Compensation for phase rotation in the demodulated signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3809—Amplitude regulation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0032—Correction of carrier offset at baseband and passband
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0036—Correction of carrier offset using a recovered symbol clock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0038—Correction of carrier offset using an equaliser
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0055—Closed loops single phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0071—Control of loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0071—Control of loops
    • H04L2027/0079—Switching between loops
    • H04L2027/0081—Switching between loops between loops of different bandwidths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
    • H04L7/002—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation
    • H04L7/0029—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation interpolation of received data signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

A QUADRATURE AMPLITUDE MODULATION (QAM) TYPE DEMODULATOR (99) HAVING A PAIR OF DIRECT DIGITAL SYNTHESIZER (DDS) CIRCUITS (30,545). THE FIRST DDS CIRCUIT (30) IS LOCATED IN A BASEBAND CONVERSION CIRCUIT BEFORE A RECEIVE FILTER (40) AND DIGITALLY TUNES THE SIGNAL WITHIN THE RECEIVE FILTER BANDWIDTH. THE SECOND DDS CIRCUIT (545) IS WITHIN A CARRIER RECOVERY CIRCUIT (50) LOCATED AFTER THE RECEIVE FILTER AND SERVES TO FINE TUNE THE SIGNAL PHASE.(FIG 2)
MYPI20010767A 2000-04-17 2001-02-21 Direct digital synthesis in a qam demodulator MY134001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/550,556 US6249179B1 (en) 1999-09-08 2000-04-17 Direct digital synthesis in a QAM demodulator

Publications (1)

Publication Number Publication Date
MY134001A true MY134001A (en) 2007-11-30

Family

ID=24197671

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20010767A MY134001A (en) 2000-04-17 2001-02-21 Direct digital synthesis in a qam demodulator

Country Status (11)

Country Link
US (1) US6249179B1 (en)
EP (1) EP1299979A1 (en)
JP (1) JP2004522363A (en)
KR (1) KR20030043787A (en)
CN (1) CN1190052C (en)
CA (1) CA2416960A1 (en)
HK (1) HK1057438A1 (en)
MY (1) MY134001A (en)
NO (1) NO20024936D0 (en)
TW (1) TWI233723B (en)
WO (1) WO2002103976A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6160443A (en) * 1999-09-08 2000-12-12 Atmel Corporation Dual automatic gain control in a QAM demodulator
US7068731B1 (en) * 2000-10-24 2006-06-27 Agere Systems, Inc. Apparatus and method for multi-channel receiver
KR100441196B1 (en) * 2002-01-14 2004-07-21 기가텔레콤 (주) Apparatus for continuous phase quadrature amplitude modulation and demodulation
SE0201159L (en) * 2002-04-16 2003-07-01 Spirea Ab Kvadraturfasstyrslinga
US7358885B2 (en) 2003-02-28 2008-04-15 Silicon Laboratories, Inc. Mixing DAC architectures for a radio frequency receiver
US7425995B2 (en) * 2003-02-28 2008-09-16 Silicon Laboratories, Inc. Tuner using a direct digital frequency synthesizer, television receiver using such a tuner, and method therefor
EP1611688A4 (en) * 2003-02-28 2006-05-31 Silicon Lab Inc Tuner for radio frequency receivers and associated method
US7447493B2 (en) * 2003-02-28 2008-11-04 Silicon Laboratories, Inc. Tuner suitable for integration and method for tuning a radio frequency signal
US7676210B2 (en) * 2003-09-29 2010-03-09 Tod Paulus Method for performing dual mode image rejection calibration in a receiver
US7212593B2 (en) * 2003-10-14 2007-05-01 Telefonaktiebolaget Lm Ericsson (Publ) Method of and apparatus for noise whitening filtering
US7289583B2 (en) * 2003-10-14 2007-10-30 Telefonktiebolagel Lm Ericsson (Publ) Method of and apparatus for single antenna interference rejection through relaxation
US7856224B2 (en) * 2005-03-31 2010-12-21 General Electric Company Systems and methods for recovering a signal of interest from a complex signal
NL1031482C2 (en) * 2006-03-31 2007-10-05 Stn B V Cable television system with extensive quadrature amplitude modulation signal exchange, transmitting means and a management center therefor.
US7773968B2 (en) * 2006-11-30 2010-08-10 Silicon Laboratories, Inc. Interface/synchronization circuits for radio frequency receivers with mixing DAC architectures
US20080180579A1 (en) * 2007-01-31 2008-07-31 Silicon Laboratories, Inc. Techniques for Improving Harmonic and Image Rejection Performance of an RF Receiver Mixing DAC
US20080181337A1 (en) * 2007-01-31 2008-07-31 Silicon Laboratories, Inc. Spur and Distortion Management Techniques for an RF Receiver
US20080181340A1 (en) * 2007-01-31 2008-07-31 Silicon Laboratories, Inc. Spur Rejection Techniques for an RF Receiver
US7599676B2 (en) * 2007-01-31 2009-10-06 Silicon Laboratories, Inc. Power consumption reduction techniques for an RF receiver implementing a mixing DAC architecture
KR100841401B1 (en) 2007-12-26 2008-06-26 주식회사 이디 Am, fm, fm stereo integration modulation apparatus and method
TWI353776B (en) * 2008-05-26 2011-12-01 Novatek Microelectronics Corp Signal adjusting circuit
JP2011199554A (en) 2010-03-19 2011-10-06 Panasonic Corp Complex signal processing circuit, receiver circuit, and signal reproducing apparatus
CN102098267B (en) * 2011-01-24 2014-06-25 中国科学院半导体研究所 High-speed low power consumption 16QAM (Quadrature Amplitude Modulation) emitting device
WO2014176719A1 (en) * 2013-04-28 2014-11-06 华为技术有限公司 Carrier synchronization method and device
RU2761521C1 (en) * 2021-05-21 2021-12-09 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Digital incoherent signal demodulator with amplitude quaternary phase-shift keying

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315619A (en) 1992-05-15 1994-05-24 Rca Thomson Licensing Corporation Carrier recovery processor for a QAM television signal
JP3268138B2 (en) * 1994-09-29 2002-03-25 三菱電機株式会社 Communication device, frequency synthesizer and synthesis method
US6160443A (en) * 1999-09-08 2000-12-12 Atmel Corporation Dual automatic gain control in a QAM demodulator
US6249180B1 (en) * 1999-09-08 2001-06-19 Atmel Corporation Phase noise and additive noise estimation in a QAM demodulator

Also Published As

Publication number Publication date
CN1190052C (en) 2005-02-16
TWI233723B (en) 2005-06-01
JP2004522363A (en) 2004-07-22
US6249179B1 (en) 2001-06-19
WO2002103976A8 (en) 2003-02-20
CN1459178A (en) 2003-11-26
EP1299979A1 (en) 2003-04-09
NO20024936D0 (en) 2002-10-14
CA2416960A1 (en) 2002-12-27
HK1057438A1 (en) 2004-04-02
WO2002103976A1 (en) 2002-12-27
KR20030043787A (en) 2003-06-02

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